The invention discloses a very small aperture terminal (VSAT) network-based gateway station fax processing method. According to the method, received data are demodulated; a data processing directory is configured and a parameter needed for fax processing is designated; the demodulated data are processed into a fax; and then the fax is sent to the internet by a switch or is sent to a fixed telephone network by a ground access gateway. Therefore, because the data received by the gateway station are demodulated and then are processed into the fax that can be identified by the internet or the fixed telephone network for sending, communication between the gateway station and the internet in the VSAT network as well as communication between the fixed telephones in the fixed telephone network can be realized.